You have great equipment. The Esoteric's are killer. I love my DV50. For power and interconnects, the best you can get. Rowland gear seems to like Cardas. I've owned Golden Cross and Golden Reference, and liked the GR better.
You might consider Purist Venestas, Opis, or Dominus for Interconnect. Purist Dominus for Power. I seem to like this in my system and on my Esoteric better than the Cardas or Transparent Ref w/xl. I've all all of these, so it's from personal experience.
Good luck!